Hey new here looking for some help

im from southern ontario, im not sure what headliners in it i havent had a chance to check it out i just started with the power train and the exterior needs a front passenger fender as well ill post pics when i get off work, currently iv got new bucket seats since the transmission prior was upgraded to a floor shifter instead of a tree shifter, so the standard bench seats wont fit in it, i believe it was a manual trans before upgraded to the torquefly auto trans when the old manual burnt out so old owner put the console on the floor, also those headliners look good from classic industries, if summit has one that fits would be better do my whole order with them so if theres any issues i dont chase anyone but them. also anyone have an idea why my car "drives" with out my foot on the gas my buddy says its most likely the carb, but i have no idea how to adjust a carb or what to listen for if i got it right, if anyone coould explain cause my friend said its around 500-1000 to have an engine tuned. but shes a black and yellow H code 340. so i want to do it as best i can.